function createRequestObject(){
	var request_o; 
	var browser = navigator.appName; 
	if(browser == "Microsoft Internet Explorer"){
		request_o = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		request_o = new XMLHttpRequest();
	}
	return request_o; 
}

var http = createRequestObject(); 


function newTab(n) {
	http.open('get', 'docdata/' + n + '.htm');
    http.onreadystatechange = completeP;
    http.send(null);
}

function completeP(){

	if(http.readyState == 4) {	
		var response = http.responseText;
		document.getElementById('mainsection').innerHTML = response;
		}
	}